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Anna35 [415]
3 years ago
12

A videotape can record 2 hours on short play, 4 hours on long play, or 6 hours on extra long play. After recording 32 minutes on

short play and 44 minutes on long play, how many minutes can it record on extra-long play
Mathematics
1 answer:
AlekseyPX3 years ago
5 0

Answer:

It can record 198 mintues on extra-long play

Step-by-step explanation:

The full battery(100%) of the videotape is:

2 hours(120 minutes) on short play

4 hours(240 minutes) on long play

6 hours(360 minutes) on extra long play.

32 minutes on short play

It used 32/120 = 0.2667 of the battery

44 minutes on long play

it used 44/240 = 0.1833 of the battery

Battery used:

0.2667 + 0.1833 = 0.45

Battery remaining

1 - 0.45 = 0.55

Out of 6 hours(360) on long play

0.55*360 = 198

It can record 198 mintues on extra-long play

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MAVERICK [17]
Letter C is your answer.
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3 years ago
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If the standard deviation of an exam is 5, the z-score us 1.95 and the mean is 80; what is the actual test score? (Round the ans
skad [1K]

If the standard deviation of an exam is 5, the z-score us 1.95 and the mean is 80, the actual test score is; 89.75

<h3>How to solve z-score problems?</h3>

We are given;

Standard deviation; s = 5

z-score = 1.95

Mean = 80

Formula for z-score is;

z = (x' - μ)/σ

Thus;

1.95 = (x' - 80)/5

1.95 * 5 = (x' - 80)

9.75 = x' - 80

x' = 80 + 9.75

x' = 89.75

Read more about Z-score Problems at; brainly.com/question/25638875

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6 0
2 years ago
Misha wrote the quadratic equation 0=-x2+4x-7 in standard form. what is the value of c in her equation
Masteriza [31]

Answer:

Final answer is c=-7.

Step-by-step explanation:

Given equation is 0=-x^2+4x-7.

Now question says that Misha wrote the quadratic equation 0=-x2+4x-7 in standard form. Now we need to find about what is the value of c in her equation.

We know that standard form of quadratic equation is given by ax^2+bx+c=0.

compare given equation with the standard form, we find that -7 is written in place of +c

so that means +c=-7

or c=-7

Hence final answer is c=-7.

8 0
3 years ago
Find the measure of
Goryan [66]
What are you talking about
5 0
2 years ago
Read 2 more answers
UNIT 8
DochEvi [55]

For the first figure the Circumference of the circle is: 5.3\ip\pi cm.

For the second figure the Circumference of the circle is: 80\ip\pi inch.

<h3>What is Circumference of the Circle?</h3>

The circumference of a circle is defined as the linear distance around it.

i.e.,  C= 2 *\pi*r

  • For First Figure,

Circumference of the circle:

= 2 *\pi*r

= 2 *\pi* \frac{5.3}{2}

= 2 *\pi*2.65

Circumference= 5.3*\pi cm

  • For the second Figure,

Circumference = 2 *\pi*r

= 2 *\pi*40

 = 80 *\pi

Circumference =80\pi \;inch

For the first figure the Circumference of the circle is: 5.3\ip\pi cm.

For the second figure the Circumference of the circle is: 80\ip\pi inch.

Learn more about circumference of circle here:

brainly.com/question/23239017

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4 0
2 years ago
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